Pump-operating means.



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APPLICATION FILED SEPT. 30. 1910.

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. PUMP-OPENING MEANS.

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Specification of Letters Patent.

Patented Apr. 27, 1915..

Application filed September so, 1910. Serial no. 584,662.

To all whom it may concern:

Be it known that I, SYLVANUS F. Bowsnn,

a citizen ofthe United States, residlng at Fort Wayne, in the county of Allen and State of Indiana, have invented certain new the reciprocating piston type, which may ormay not be provided with registering or self-measuring instrumentalities. The nvention, however, is chiefly adapted for use in pumps of the self-measuring type which heretofore have had their pistons reciprocated by a rack and gear movement, the rack being secured to the piston and the gear being in mesh with the rack and under the.

control of the operator to cause the rack and piston to be reciprocated. The gear for driving the rack is generally operated by a handle, and sometimes intermediate gearing, and it has been necessary for the operator to rotate the gear and handle in one direction until the rack has reached the limit or desired degree of its movement, when the direction of rotation of the gear and handle must be reversed to drive the rack and the piston in the opposite direction. This construction necessitates the frequent reversal of movement of the driving means by the operator, which, for many reasons, particularly in self-measuring pumps, is objectionable, and it is to obviate this objection and to provide an improved pump of the reciprocating type in which the driving means may be constantly rotated in one direction to impart reciprocatory movement to the piston, that is the primary object of the invention.

The invention also consists in certain details of construction and arrangement of various parts hereinafter more particularly piston type to which the invention is shown applied. In this View portions of the pump, which is of the self-measuring type, are broken away, and other parts are omitted,

since they form no part of the invention. A broken portion of the pump barrel with the piston is also shown in section. Fig. 2 1s a v ewof the driving mechanism of the pump taken at right angles to the view in Flg. 1. Fig. 3 is a top plan View.

The cylinder of the pump may be of any deslred form and construction, one form he mg shown in. Fig. 1, as indicated by the reference character 10, the valve casing 11 and parts connected thereto being shown secured to the bottom of the barrel by suitable stay rods 12.

13 is the piston and 14 the piston rod. The piston rod extends upwardly through the pump barrel and into the frame for the drivingmechanism, indicated by the reference character 15, the same being secured to the top of the pump barrel as indicated. The frame 15 for the driving mechanism is provided with a long vertical groove or guide-way, as indicated at 16, the sides of which diverge inwardly toward the bottom of the groove, thus forming means for retaming in position therein the member 17, which is secured to the upper end of the piston rod 1 The member 17 is held in position in the groove or guide-way 16 by reason ofthe diverging sides of the guide-way, since the sides of the member 17 also diverge inwardly, the top of the groove or guideway 16,being preferably left open to allow the member 17 to be inserted. Near the top and the bottom of the member 17, preferably integrally therewith, are the vtwo angula-r extensions as indicated at'17 and 17", Fig. 2, and through these extensions the piston rod 14 is loosely passed, suitable holes being provided therein for this purpose. Cast integrally with the member 17, or secured to the outer extremities of the branches 17", 17 is a rack bar 18. The form of the rack bar is most clearly shown in Fig. 1, from which it will be seen that it is an elongated pinion in that both sides of the bar and the ends thereof are provided with teeth which are adapted to be in mesh atall times with the pinion 19 on the crank shaft 20, to which is secured the crank or handle 21. The crank shaft 20 and the pinion 19 carried thereby are movably supported in abearing at the top of the member 22, which is pivotally secured to the frame 15 at 23. The rocking movement of the pivoted member 22 and consequently of the shaft 20 with pinion 19 and the handle 21 is limited by adjustable stops on the frame 15, the same comprising set screws or bolts 24, 25, which are threaded into lugs 26, 27 and held in their adjusted positions by lock nuts 28, 29. t The connection between the member 17, which carries the rack bar 18, and the piston rod 14, is as follows: The piston rod 14 passing through the extensions at the top and the bottom of the member 17, is rovided beyond those extensions with ad ustable collars 30, 31, held in adjusted position on the piston rod by set screws 32, 33. Interposed between collars 30, 31, and the extensions on the ends of the reciprocating member 17 are the coil compression springs The operation of the pump is as follows: The handle 21 being operated in either direction, motion in a given direction will be imparted to the gear 19, which is in constant engagement with the rack bar 18. When the rack bar has been moved to the lowermost limit of its movement, for example, through the operation of the gear 19 through handle 21, the gear 19 will ride over the top end of the rack bar 18, being permitted such movement because'its hearing at the top, of the pivoted member 22 is movable. During the driving of the rack bar 18 downwardly, however, the gear 19 is held in mesh with the rack bar because the pivoted bearing member 22 is engaged by the end of the adjustable set screw 24. Whenever the rack bar reaches the lowermost limit of its movement,

- the gear 19, as described, will ride over the top end of the same, the gear 19, and the pivoted bearing member 22 to the position shown in dotted lines in Fig.1, with the pivoted member 22 in engagement with the set screw 25. If, now, the rotation of the handle in the same direction be continued, it will be seen that the same direction of movement of the gear 19 will reverse the direction of movement of the rack bar 18 and cause it to move upwardly until it reaches the upward limit of its movement, when the gear 19, as before, will ride over the end of the rack bar, this time at the lower end of the same, the position of the the opposite side of the rack bar, and the continued rotation of the gear in the same direction will again reverse the direction of movement of the rack bar, causing the same to be moved downwardly, as before, to the starting position, when the movements just described will be repeated, if the handle and the gear 19 arecontinuously rotated in the same direction. In order to prevent jarring of the mechanism at the moment of reversal of the rack bar, and to keep the gear 19 in constant engagement with the teeth' of the rack bar 18, particularly at the ends thereof, and during the operation of reversal of movement of the rack bar, I have provided the compression springs 34, 35, before debringing the handle,

gear 19 will be changed toscribed. It is found that these springs serve to cushion the mechanism against the jars which might result from sudden reversal of the piston, and breakage of the teeth on the gear 19, and'the rack bar 18, is prevented because, by this construction, the gear and rack are kept in constant engagement. The meshing oi the gear 19 with the teeth of the rack bar 18 may be regulated by the adjustable set screws 24, 25, and any wear of the parts in this manner taken up.

In a pump of this construction it will be seen that it may be operated continuously for any given length of time without reversing the direction of rotation of the driving handle, and in a self measuring pump, when this invention is applied to the same, the handle may be rotated constantly in one direction by the operator until a given quantity of liquid, as indicated by the registering mechanism, has been dispensed.

In order that the invention might be understood, the details of the preferred em- "reciprocation, an arm pivoted to the support, a gear rotatably mounted in the arm and adapted to engage the teeth of the member, and lateral fixed stops to engage the arm to limit its angular movement in both directions and to hold the gear carried by the arm in engagement with the toothed member.

2. The combination with a reciprocable rack having a continuously toothed periphery, of a support therefor to permit the reciprocation, an arm pivoted to the support, a gear rotatably mounted in the arm and adapted to engage the teeth of the rack, lateral fixed stops on the support to engage opposite sides of the arm and to limit the angular movement of the arm about its pivotal support in both directions for holding the gear in engagementwith the rack, and adjustable means in connection with the lugs to engage the arm for taking up wear and for setting the gear with respect to the rack.

3. The combination with a reciprocable peripherically toothed rack, of a support in which it is movable, an arm pivoted to the support, a gear adapted to mesh with the teeth of the rack, means to rotatably mount thegear in the arm, means to hold the gear in engagement with the rack at the sides, and resilient means at each end of the rack to hold the gear in contact with the rack at mama the ends thereof in the intervals between the reciprocating movements of the rack while the gear is constantly rotated.

4. The combination with a reciprocable elongated rack bar provided with a continuously toothed periphery, of a support therefor permitting the reciprocation thereof, an arm pivoted to the support, a gear adapted to mesh with the teeth of the rack, means to rotatably mount the gear in connection with the arm, adjustable limiting means for the arm to hold the gear in contact with the sides of the rack bar during its reciprocation, and resilient means at each end of the rack bar, one of which is compressed when the rack is reciprocated in either direction to hold the gear and rack in co'ntact at the ends of the reciprocating movements of the rack when the gear passes from one side of the rack to the other.

5. The combination with a reciproc'able elongated rack bar having a continuously toothed periphery and perforated portions at the ends, of a support to permit its reciprocation, a rod extending through the perforations at the ends of the rack bar, ad-

tit

justable collars on'the rod without the rack bar, a compressible spring between each col lar and the adjacent end of the rack bar, an arm pivoted in the support, a shaft rotatably mounted in the arm, a gear secured to the shaft and adapted to mesh with the teeth of the rack, a hand lever to rotate the shaft and the gear, and adjustable means to limit the angular movement of the arm and to hold the gear in contact with the teeth at the sides of the elongated rack bar, the springs being compressed in the direction of movement of the rack bar to hold the gear in contact with the rack when the arm is oscillated by the gear as it passes from side to side of the rack bar at the ends of the strokes in either direction.

In testimony whereof I have signed my name to this specification, in the presence of two subscribing witnesses, on this 20th day of September A. D. 1910.

Witnesses:

@R. E. FLEMING, J. W. Bmmows. 

